Replace SQLite dependency with newer .net standard compatible one

[Tom94]

No description provided.

[smoogipoo]

a

Addressed

[smoogipoo]

I'm not merging this one yet until the MigrateTable stuff is fixed. The following is my status on this:

• osu! for some reason still fails to add new columns to the DB.
• Forked the sqlite-net-pcl library, noticed they have a Migration test, which seems to do exactly what we're trying to do, except without explicitly calling MigrateTable (adding a column to an entity).
• Attempted to get debug SQLite running locally - quite unsuccessfully.

[smoogipoo]

Fixed. Just required a library update (apparently we added a super old stable release). @peppy requesting review

[peppy]

Has been rolled back. Please resubmit.

We need to ensure

• works with 32 and 64 bit
• works on linux and macos (at least test one of these)
• works with old and fresh databases

[peppy]

The remaining issue seems to be documented at praeclarum/sqlite-net#631